test: update test_peer_storage to validate latest changes

Ensure that we correctly handle the sendpeerstorage message event from chainmonitor
and process it through channelmonitor.

Key Changes:
- Retrieve sendpeerstorage message event from chainmonitor for both nodes.
- Handle peer storage messages exchanged between nodes and verify correct decryption.

lightning/src/ln/channelmanager.rs

@@ -15077,10 +15077,27 @@ mod tests {
 		let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 
 		create_announced_chan_between_nodes(&nodes, 0, 1);
-
-		// Since we do not send peer storage, we manually simulate receiving a dummy 
-		// `PeerStorage` from the channel partner.
-		nodes[0].node.handle_peer_storage(nodes[1].node.get_our_node_id(), msgs::PeerStorage{data: vec![0; 100]});
+
+		let peer_storage_msg_events_node0 = nodes[0].chain_monitor.chain_monitor.get_and_clear_pending_msg_events();
+		let peer_storage_msg_events_node1 = nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_msg_events();
+		assert_ne!(peer_storage_msg_events_node0.len(), 0);
+		assert_ne!(peer_storage_msg_events_node1.len(), 0);
+
+		match peer_storage_msg_events_node0[0] {
+			MessageSendEvent::SendPeerStorage { ref node_id, ref msg } => {
+				assert_eq!(*node_id, nodes[1].node.get_our_node_id());
+				nodes[1].node.handle_peer_storage(nodes[0].node.get_our_node_id(), msg.clone());
+			}
+			_ => panic!("Unexpected event"),
+		}
+
+		match peer_storage_msg_events_node1[0] {
+			MessageSendEvent::SendPeerStorage { ref node_id, ref msg } => {
+				assert_eq!(*node_id, nodes[0].node.get_our_node_id());
+				nodes[0].node.handle_peer_storage(nodes[1].node.get_our_node_id(), msg.clone());
+			}
+			_ => panic!("Unexpected event"),
+		}
 
 		nodes[0].node.peer_disconnected(nodes[1].node.get_our_node_id());
 		nodes[1].node.peer_disconnected(nodes[0].node.get_our_node_id());
@@ -15092,9 +15109,24 @@ mod tests {
 			features: nodes[0].node.init_features(), networks: None, remote_network_address: None
 		}, false).unwrap();
 
+		let node_1_events = nodes[1].node.get_and_clear_pending_msg_events();
+		assert_eq!(node_1_events.len(), 2);
+
 		let node_0_events = nodes[0].node.get_and_clear_pending_msg_events();
 		assert_eq!(node_0_events.len(), 2);
 
+		for msg in node_1_events{
+			if let MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } = msg {
+				nodes[0].node.handle_channel_reestablish(nodes[1].node.get_our_node_id(), msg);
+				assert_eq!(*node_id, nodes[0].node.get_our_node_id());
+			} else if let MessageSendEvent::SendPeerStorageRetrieval { ref node_id, ref msg } = msg {
+				nodes[0].node.handle_peer_storage_retrieval(nodes[1].node.get_our_node_id(), msg.clone());
+				assert_eq!(*node_id, nodes[0].node.get_our_node_id());
+			} else {
+				panic!("Unexpected event")
+			}
+		}
+
 		for msg in node_0_events{
 			if let MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } = msg {
 				nodes[1].node.handle_channel_reestablish(nodes[0].node.get_our_node_id(), msg);
@@ -15107,30 +15139,9 @@ mod tests {
 			}
 		}
 
-		let msg_events_after_peer_storage_retrieval = nodes[1].node.get_and_clear_pending_msg_events();
-
-		// Check if we receive a warning message.
-		let peer_storage_warning: Vec<&MessageSendEvent> = msg_events_after_peer_storage_retrieval
-									.iter()
-									.filter(|event| match event {
-										MessageSendEvent::HandleError { .. } => true,
-										_ => false,
-									})
-									.collect();
-
-		assert_eq!(peer_storage_warning.len(), 1);
-
-		match peer_storage_warning[0] {
-			MessageSendEvent::HandleError { node_id, action } => {
-				assert_eq!(*node_id, nodes[0].node.get_our_node_id());
-				match action {
-					ErrorAction::SendWarningMessage { msg, .. } =>
-						assert_eq!(msg.data, "Invalid peer_storage_retrieval message received.".to_owned()),
-					_ => panic!("Unexpected error action"),
-				}
-			}
-			_ => panic!("Unexpected event"),
-		}
+		// Clear all other messages.
+		nodes[1].node.get_and_clear_pending_msg_events();
+		nodes[0].node.get_and_clear_pending_msg_events();
 	}
 
 	#[test]